| Specifications | IO-45HD | Competitor’s Tower |
| Tower Height | 4.5 feet (54 inches) | 4.5 feet (54 inches) |
| Shipping Weight | 39 lbs. | 17 lbs. |
| Base Width (to outer edge of leg) | 25 inches | 24 inches |
| Base Width (to outer edge of foot) | 29 inches | 26.75 inches |
| Max. Antenna Wind Area at tower top | 13 sq. ft. at 80 mph | 10.2 sq. ft. at 85 mph |
| Max. Antenna + Rotor + Mast weight | 200 lbs. | 125 lbs. |
| Tower Top Width | 5 inches | 5 inches |
| Rotor Plate location from Top | 34.5 inches (bottom shelf) | 34.75 inches |
| Maximum Mast Diameter | 2.5 inches | 2.375 inches |
| Maximum Mast Length | 7 feet (84 inches) | 5 feet (60 inches) |
| Rotor Mounting Options | Hy-Gain or Yaesu |
Hy-Gain and Yaesu |
| Thrust Bearing Mounting Options | Yaesu GS-065 | TB-25 (optional) |
| Fixed (non-rotating) Mast Option | UMB-1 |
MC-10 (optional) |
| Leg and shelf material | 6061-T6 aluminum (3/16″ thick x 2″ angle) | 6061-T6 aluminum (1/8″ thick x 1.5″ angle) |
| Foot material | 6061-T6 aluminum (1/4″ thick x 2″ angle) | 6061-T6 aluminum (1.5″ x 2″ angle) |
| Rotor Shelf material | 6061-T6 aluminum (3/16″ thick x 2″ angle) | 6061-T6 aluminum (1/8″ thick x 1.5″ angle) |
| X-Brace material | 6061-T6511 aluminum (1/8″ x 2″ flat) | 6061-T6511 aluminum (1/8″ x 3/4″ flat) |
| Assembly Hardware | 5/16″-18 18-8 stainless steel (32) | 1/4″-20 18-8 stainless steel |
| Foot to Leg hardware | 3/8″-16 18-8 stainless steel (4) | 3/8″-16 18-8 stainless steel |
| Lockwashers/nylon locknuts | Yes |
nylon locknuts |
| Holes Deburred | Yes | ? |
| Part Edges Deburred | Yes | ? |
| Climbable | Yes – with tower climbing belt or harness | No |
The IO-45HD is perfect for moderate sized HF beam antennas such as the Hy-Gain Explorer-14, KIO 5-band Hex Beam, Traffie Tech HX-5Bi, DX-Engineering HEXX beam, K4HEX hexagonal beam …
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